macrodef for xpathproperty in ant

No additional ant dependencies. as long as your in Java 6+

Usage:
<xpathproperty name="prop.name" value="//key/text()" file="my.xml" />

<macrodef name="xpathproperty">
<attribute name="name" />
<attribute name="value" />
<attribute name="file" />

<sequential>
<script language="javascript"> <![CDATA[
importPackage(javax.xml.xpath);
importPackage(java.io);
importClass(org.xml.sax.InputSource);

var xpathExp = XPathFactory.newInstance().newXPath().compile("@{value}");
var inputSource = new InputSource(new FileInputStream("@{file}"));

var prop = sfpricer.createTask("property");
prop.setName("@{name}");
prop.setValue(xpathExp.evaluate(inputSource));
prop.perform();

]]> </script>
</sequential>
</macrodef>